2x12 Roof Rafter Span Limits

1 ft 0 3048 m.

2x12 roof rafter span limits. 2 are indicated below. View joist rafter tables. An syp rafter can span 11. Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters.

Live load is weight of furniture wind snow and more. Sizing rafters differs from sizing joists in 2 ways. Douglas fir maximum horizontal roof rafter span for lumber grade selected structural and no. Rafters are sized the same way as joists.

Both of these are for light roof loads. Dead load weight of structure and fixed loads 15 lbs ft 2. And then select the appropriate species size and grade from awc s design values for joists and rafters publication. So this table could accommodate a house with a total rafter span or house width of 32 feet.

As mentioned above a 2 4 spf shed roof rafter can span 11. Ceiling joist span use this table to determine the maximum lengths of ceiling joists based on species of lumber joist spacing and joist size. If you live in an area that requires a shed roof rafter to support a heavy load then an spf rafter can only span 7. Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12.

Establish live load dead load and deflection limits. Also available for the android os. For example in the rafter span table below the highlighted cell in the 40 live load table indicates that 2 x 8 southern yellow pine joists that have a grade of 2 that are spaced 24 apart can have a maximum span of 10 feet 3 inches 10 3 if designing for a live load of 40 lbs ft 2. Rafter spans can be extended slightly beyond what the rafter tables suggest when there is a cantelever extending beyond the supporting wall.

Patio roof maximum beam rafter spans beamsmeasuring pergola dimensions learn the standardwhat is max distance between posts using 2x12x20 foot beams for apergola beam span. Use the appropriate rafter table to determine acceptable fb and e values. 1 psf lb f ft 2 47 88 n m 2. Span calculator for wood joists and rafters also available for the android os.